On Fri, 7 Jul 2006 06:39:18 +0100 someone who may be Helen Deborah
Vecht wrote this:-

Given my disabilities, I don't think I can replace my hall lamp fitting
for less than about £100.

How long would it take for me to recoup that expenditure? (Currently
120w, maybe 6 hours/day. New fitting maybe 20w or so) We are talking
several years if it saves 10p per day, aren't we?

Well, the difference is 100W and so in 10 hours you will save one
unit, say 10p. Assuming 300 days in a year, to compensate for your 6
hours rather than 10, that is a saving of thirty pounds a year. That
assumes no gear losses, something the manufacturers are somewhat
quiet about. As there are gear losses and they are not (AFAIK) in
the stated figures then your saving will reduce to say 20 pounds a
year.

What this shows is how worthwhile compact fluorescents are compared
to GLS bulbs, provided that they are a simple replacement. The extra
costs of having an electrician replace a fitting are real, but no
different from having someone else do all sorts of other jobs.


--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54